RS5C372B-E2(1997) View Datasheet(PDF) - RICOH Co.,Ltd.
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Description
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RS5C372B-E2 Datasheet PDF : 39 Pages
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Example1 of data read (when data is read from 2h-4h)
R/W=0(Write)
Repeated Start Condition
R/W=1(Read)
S 0 1 1 0 0 1 0 0 A 0 0 1 0 0 0 0 0 A Sr 0 1 1 0 0 1 0 1 A
Transmission of
slave address
(0110010)
Setting of 2h Setting of 0h
to the Internalto the trans-
Address mission for-
Pointer
mat register
Transmission of
slave address
(0110010)
Data
Reading of data
from the Internal
Address 2h
A
Data
A
Data
/A P
Reading of data
from the Internal
Address 3h
Reading of data
from the Internal
Address 4h
Master to slave
S Start Condition
A A /A Acknowledge
Slave to master
Sr Repeated Start
Condition
P Stop Condition
RS5C372B
2) The second method to reading data from the internal register is to start reading immediately after writing
to the Internal Address pointer and the transmission format register. Although this method is not based on
the I2C-bus standard in a strict sense it still effective to shorten read time to ease load to the master. Set
4h to the transmission format register when this method is used.
Example2 of data read (when data is read from Eh-1h)
R/W=0(Write)
S0 1 1 0 0 1 0 0A1 1 1 0 01 0 0A
Data
A
Transmission of
slave address
(0110010)
Setting of Eh Setting of 4h
to the Internalto the trans-
Address mission for-
Pointer
mat register
Reading of data
from the Internal
Address Eh
Data
Reading of data
from the Internal
Address Fh
A
Data
Reading of data
from the Internal
Address 0h
A
Data
Reading of data
from the Internal
Address 1h
/A P
Master to slave
S Start Condition
A A /A Acknowledge
Slave to master
P Stop Condition
3) The third method to reading data from the internal register is to start reading immediately after writing to
the slave address and the R/W bit. Since the internal address pointer is set to Fh by default as described
in 1), This method is only effective when reading is started from the internal address Fh.
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